Router



No. 609,68l.

Patented Aug. 23, |898. A. J. KNIFFEN.

ROUTER.

(Application filed Sept. 27, 1897.)

' (No Modem flaw/I Witnesses. y nvewhof. OJL-- .IQ%.

e Aww m UNITED STATES PATENT OFFICE.

ALLEN J. KNIFFEN, OF SCI-IENECTADY, NEWT YORK.

ROUTER.

SPECIFICATION forming part of Letters Patent No. 609,681, dated August 23, 1898.

Application led September 27, 1897. Serial No. 653,151. (No model.)

To @ZZ whom it may concern.

Be it known that l, ALLEN J. KNIFFEN, a citizen of the United States,residing at Schenectady, county of Schenectady, StateV of New York, have invented certain new and useful Improvements in Routers, of which the fol` lowing is a specification.

This invention relates to that class of wood? working-tools known as router-planes, or, as more commonly called, routers.

The object of the invention is to provide a router in which the cutting-tool can be adjusted with precision and accuracy and secured in its adjusted position and also can be readily and quickly mounted in its support and removed therefrom.

The invention consists in a router constructed and arranged as hereinafter set forth and claimed. j

Referring to the accompanying drawings, Figure 1 is a perspective View of a router constructed in accordance with this invention. Fig. 2 is a vertical section thereof through the middle,with the cutting-tool in full View; and Fig. 3 is a detail view, in horizontal sec-V tion, showingthe means for holding and securing the tool in place.

The router is providedwith a base 1, as here shown of an oblong rectangular shape, having the two side recessed portions 2 and the central rectangular opening 3. Suitable handles 4. are mounted in the recessed portions 2. rllhe back of the rectangular opening is formed with the raised portion 5, on which is mounted the cutting-tool. This consists of the cutting portion 6 on the lower end of the shank 7. The shank 7 is removably located in sleeves 8 9 8 of three bracket-arms 8 9 8', the sleeves 8 8 being fixed tothe upper and lower ends of a plate 10, mounted in the raised portion 5 in anysuitable manner--k as, for example, by means of a dovetailed joint-and secured thereto bya screw or other suitable means. The sleeve 9 is vertically movable between the sleeves 8 8, preferably in asuitable groove in plate l0,as here shown, especially in Fig. 3 of the drawings, the rear portion of sleeve 9 engaging a groove 10', which serves as a guideway for the sleeve 9, as well as a seat therefor when it is locked in position. rIhe sleeve 9 has also a slight lat eral play. The sleeve 9 is provided on its rear with a threaded arm extending through a vertical slot 12 in plate 10 and the slot 13 in the raised portion 5, the slot 13 being in alinement with the slot 12. A wing 14 and washer 15, lying across the slot 13, are mounted on the arm 11 vand serve to lock the sleeve 9 after the adjustment of the tool is eected and by drawing it laterally to clamp the tool-shank.

The sleeve 9 is moved by means of an adjusting-screw 16, which has a threaded engagement with the bracket-arm 9', the upper and 4the shaft 7 maynot drop out of the sleeve 8 9 8 when the wing-nut 14 is loosened, some means is necessary to hold it in frictional engagement therein, which also permits of its being adjusted in said sleeve before the sleeve 9 is adjusted. Any suitable means may be employed for holdingthe shaft in such frictional engagement.

As herel shown, more particularly in Fig. 3, a spring 1S is employed, mounted in a recess 19 in the back of sleeve 9 and bracket-arm 9', the outer or free end of spring 1S projecting into sleeve 9 and bearing against the shank 7. The rear of shank 7 is preferably formed with the flattened portion 20 to afford room and a better surface for the spring 18'to bear against shank 7.

In this class of devices it is necessary to readily and precisely adjust the cutting portion 6 to the depth required below the base 1, and this is effected as follows: The wing-nut 14. being loosened, the shank 7 is held in the sleeves 8 9 8 by frictional engagement of spring 2O and may be pushed to approximately the desired position. The precise adjustment of the cutting-tool is then effected by turning IOG the parts in position. This binding action is very essential in tools of this kind, because if there is the slightest vibration in the tool it Will not perform the Work properlyand Will, as it is called, chatter.7 vBy having the parts mounted on the plate 10, as shown, they may be readily and quickly disconnected from the raised portion for packing or repair by unfastening the plate 10 and sliding it out of position.

If preferred, in lieu of the plate 10 the bracket-arms 8 may be mounted directly on the raised portion 5.

It Will thus be seen that by means. of a router constructed and arranged as herein set forth the cutting-tool can be easily placed in position or removed, will be held in this movable and removable position by frictional engagement, andcan be quickly and precisely adjusted to the desired cutting position and locked in place.

Having described my invention, what l claim as new, and desire to secure by Letters Patent, is-

l. A router having xedsleeves mounted on bracket-arms,an intermediate sleeve-movable vertically and slightly laterally mounted on a movable bracket-arm, and an adjustingscrew for vertically adjusting the movable sleeve, in combination with a cutting-tool projecting from the movable sleeve, and having a nut for binding and locking the movable sleeve to the main frame of the tool and also drawing it laterally, in combination with a cutting-tool having its shank held in frictional vengagement with 'said sleeve, as set forth. p

3. A router having xed brackets carrying 1 sleeves, a vertical groove between said bracklets, a movable bracket and sleeve engaging and movable vertically and slightly laterally in said groove, an adjusting-screw engaging said bracket, a threaded arm projecting from said movable sleeve through a slot in the bot- In Witness whereof I havehereunto set my 'hand this 18th day of September, 1897. having a shank held in frictional engagement a in said sleeve, and means connected with the i movable sleeve for locking it to the main frame of the tool which also draws the mov- ALLEN J. KNIFFEN.

Witnesses:

Mrs. A. J. KNIFFEN, B. B. HULL. 

